Number of compositions of 3n with each part less than or equal to n.
A090667
Number of compositions of 3n with each part less than or equal to n.
Terms
- a(0) =1a(1) =1a(2) =13a(3) =149a(4) =1490a(5) =13624a(6) =117920a(7) =987568a(8) =8111200a(9) =65866496a(10) =531372800a(11) =4270866688a(12) =34254920192a(13) =274425014272
External references
- oeis: A090667